(P1+P2) Topic 1- Key Concepts Of Physics

Question 1

Equation for distance

Answer 1

Distance = speed x time

Question 2

Equation for acceleration

Answer 2

Acceleration = (final velocity - starting velocity) / time

Question 3

Equation for force

Answer 3

Force = mass x acceleration

Question 4

Equation for weight

Answer 4

Weight = mass x gravity

Question 5

Equation for GPE

Answer 5

GPE = mass x gravity x change in height

Question 6

Equation for KE

Answer 6

KE = 1/2 x mass x velocity squared

Question 7

Equation for efficiency

Answer 7

Efficiency = useful energy output / total energy input

Question 8

Equations for wave speed

Answer 8

Wave speed = frequency x wavelength
Wave speed = distance / time

Question 9

Equation for work done

Answer 9

Work done = force x distance (moved in the direction of the force)

Question 10

Equations for power

Answer 10

Power = work done / time
Power = energy transferred / time taken

Question 11

Equation for moment of force

Answer 11

Moment of force = force x perpendicular distance

Question 12

Equation for energy transferred

Answer 12

Energy transferred = charge moved x potential difference

Question 13

Equation for charge

Answer 13

Charge = current x time

Question 14

Equation for voltage

Answer 14

Voltage = current x resistance

Question 15

Equations for electrical power

Answer 15

Electrical power = current x potential difference
Electrical power = current squared x resistance

Question 16

Equation for density

Answer 16

Density = mass / volume

Question 17

Equation for force on spring

Answer 17

Force on spring = spring constant x extension

Question 18

Equation for pressure

Answer 18

Pressure = force / area

Question 19

Metre

Answer 19

m

Question 20

Kilogram

Answer 20

kg

Question 21

Second

Answer 21

s

Question 22

Ampere

Answer 22

A

Question 23

Kelvin

Answer 23

K

Question 24

Mole

Answer 24

mol

Question 25

Volt

Answer 25

V

Question 26

Frequency

Answer 26

hertz, Hz

Question 27

Force

Answer 27

newton, N

Question 28

Energy

Answer 28

joule, J

Question 29

Power

Answer 29

watt, W

Question 30

Pressure

Answer 30

pascal, Pa

Question 31

Charge

Answer 31

coulomb, C

Question 32

Resistance

Answer 32

ohm, Ω

Question 33

Magnetic flux density

Answer 33

tesla, T

Question 34

Giga, G

Answer 34

1 billion, 10^9

Question 35

Mega, M

Answer 35

1 million, 10^6

Question 36

Kilo, k

Answer 36

1 thousand, 10^3

Question 37

Centi, c

Answer 37

1 hundredth, 10^-2

Question 38

Mili, m

Answer 38

1 thousandth, 10^-3

Question 39

Micro, μ

Answer 39

1 millionth, 10^-6

Question 40

Nano, n

Answer 40

1 billionth, 10^-9